Table 1

Confirmatory factor analysis of the Swedish Dyspnoea-12

	All patients (n=182)		Patients with COPD (n=45)		Patients with non-COPD (n=137)
	Physical	Affective	Physical	Affective	Physical	Affective
Items physical subdomain
My breath does not go in all the way	0.487	0.096	0.325	0.169	0.544	0.073
My breathing requires more work	0.727	0.373	0.800	0.341	0.696	0.396
I feel short of breath	0.717	0.283	0.799	0.191	0.667	0.339
I have difficulty catching my breath	0.749	0.267	0.737	0.122	0.751	0.316
I cannot get enough air	0.772	0.301	0.681	0.272	0.794	0.318
My breathing is uncomfortable	0.714	0.412	0.670	0.496	0.733	0.384
My breathing is exhausting	0.667	0.521	0.649	0.553	0.672	0.515
Items affective subdomain
My breathing makes me feel depressed	0.487	0.096	0.325	0.169	0.544	0.073
My breathing makes me feel miserable	0.246	0.843	0.243	0.877	0.236	0.840
My breathing is distressing	0.506	0.655	0.551	0.602	0.484	0.678
My breathing makes me agitated	0.450	0.697	0.527	0.720	0.418	0.699
My breathing is irritating	0.703	0.484	0.698	0.464	0.698	0.495

Confirmatory factor analysis of the proposed two-factor model of the Swedish version of the Dyspnoea-12, in the main population and subpopulations with COPD and non-COPD.
COPD, chronic obstructive pulmonary disease.